objectcmd

Documentation

Index

• Variables
• func NodeEmpty(node *Node) bool
• type Link
• type Node
• type Object

Variables

var ErrEmptyNode = errors.New("no data or links in this node")

ErrEmptyNode is returned when the input to 'ipfs object put' contains no data

var ErrObjectTooLarge = errors.New("input object was too large. limit is 512kbytes")

ErrObjectTooLarge is returned when too much data was read from stdin. current limit 512k

var ErrUnknownObjectEnc = errors.New("unknown object encoding")

ErrUnknownObjectEnc is returned if a invalid encoding is supplied

var ObjectCmd = &cmds.Command{
	Helptext: cmds.HelpText{
		Tagline: "Interact with ipfs objects.",
		ShortDescription: `
'ipfs object' is a plumbing command used to manipulate DAG objects
directly.`,
		Synopsis: `
ipfs object get <key>       - Get the DAG node named by <key>
ipfs object put <data>      - Stores input, outputs its key
ipfs object data <key>      - Outputs raw bytes in an object
ipfs object links <key>     - Outputs links pointed to by object
ipfs object stat <key>      - Outputs statistics of object
ipfs object new <template>  - Create new ipfs objects
ipfs object patch <args>    - Create new object from old ones
`,
	},

	Subcommands: map[string]*cmds.Command{
		"data":  ObjectDataCmd,
		"links": ObjectLinksCmd,
		"get":   ObjectGetCmd,
		"put":   ObjectPutCmd,
		"stat":  ObjectStatCmd,
		"new":   ObjectNewCmd,
		"patch": ObjectPatchCmd,
	},
}

var ObjectDataCmd = &cmds.Command{
	Helptext: cmds.HelpText{
		Tagline: "Outputs the raw bytes in an IPFS object.",
		ShortDescription: `
'ipfs object data' is a plumbing command for retrieving the raw bytes stored in
a DAG node. It outputs to stdout, and <key> is a base58 encoded
multihash.
`,
		LongDescription: `
'ipfs object data' is a plumbing command for retrieving the raw bytes stored in
a DAG node. It outputs to stdout, and <key> is a base58 encoded
multihash.

Note that the "--encoding" option does not affect the output, since the
output is the raw data of the object.
`,
	},

	Arguments: []cmds.Argument{
		cmds.StringArg("key", true, false, "Key of the object to retrieve, in base58-encoded multihash format.").EnableStdin(),
	},
	Run: func(req cmds.Request, res cmds.Response) {
		n, err := req.InvocContext().GetNode()
		if err != nil {
			res.SetError(err, cmds.ErrNormal)
			return
		}

		fpath := path.Path(req.Arguments()[0])
		node, err := core.Resolve(req.Context(), n, fpath)
		if err != nil {
			res.SetError(err, cmds.ErrNormal)
			return
		}
		res.SetOutput(bytes.NewReader(node.Data))
	},
}

var ObjectGetCmd = &cmds.Command{
	Helptext: cmds.HelpText{
		Tagline: "Get and serialize the DAG node named by <key>.",
		ShortDescription: `
'ipfs object get' is a plumbing command for retrieving DAG nodes.
It serializes the DAG node to the format specified by the "--encoding"
flag. It outputs to stdout, and <key> is a base58 encoded multihash.
`,
		LongDescription: `
'ipfs object get' is a plumbing command for retrieving DAG nodes.
It serializes the DAG node to the format specified by the "--encoding"
flag. It outputs to stdout, and <key> is a base58 encoded multihash.

This command outputs data in the following encodings:
  * "protobuf"
  * "json"
  * "xml"
(Specified by the "--encoding" or "-enc" flag)`,
	},

	Arguments: []cmds.Argument{
		cmds.StringArg("key", true, false, "Key of the object to retrieve, in base58-encoded multihash format.").EnableStdin(),
	},
	Run: func(req cmds.Request, res cmds.Response) {
		n, err := req.InvocContext().GetNode()
		if err != nil {
			res.SetError(err, cmds.ErrNormal)
			return
		}

		fpath := path.Path(req.Arguments()[0])

		object, err := core.Resolve(req.Context(), n, fpath)
		if err != nil {
			res.SetError(err, cmds.ErrNormal)
			return
		}

		node := &Node{
			Links: make([]Link, len(object.Links)),
			Data:  string(object.Data),
		}

		for i, link := range object.Links {
			node.Links[i] = Link{
				Hash: link.Hash.B58String(),
				Name: link.Name,
				Size: link.Size,
			}
		}

		res.SetOutput(node)
	},
	Type: Node{},
	Marshalers: cmds.MarshalerMap{
		cmds.EncodingType("protobuf"): func(res cmds.Response) (io.Reader, error) {
			node := res.Output().(*Node)
			object, err := deserializeNode(node)
			if err != nil {
				return nil, err
			}

			marshaled, err := object.Marshal()
			if err != nil {
				return nil, err
			}
			return bytes.NewReader(marshaled), nil
		},
	},
}

var ObjectLinksCmd = &cmds.Command{
	Helptext: cmds.HelpText{
		Tagline: "Outputs the links pointed to by the specified object.",
		ShortDescription: `
'ipfs object links' is a plumbing command for retrieving the links from
a DAG node. It outputs to stdout, and <key> is a base58 encoded
multihash.
`,
	},

	Arguments: []cmds.Argument{
		cmds.StringArg("key", true, false, "Key of the object to retrieve, in base58-encoded multihash format.").EnableStdin(),
	},
	Run: func(req cmds.Request, res cmds.Response) {
		n, err := req.InvocContext().GetNode()
		if err != nil {
			res.SetError(err, cmds.ErrNormal)
			return
		}

		fpath := path.Path(req.Arguments()[0])
		node, err := core.Resolve(req.Context(), n, fpath)
		if err != nil {
			res.SetError(err, cmds.ErrNormal)
			return
		}
		output, err := getOutput(node)
		if err != nil {
			res.SetError(err, cmds.ErrNormal)
			return
		}
		res.SetOutput(output)
	},
	Marshalers: cmds.MarshalerMap{
		cmds.Text: func(res cmds.Response) (io.Reader, error) {
			object := res.Output().(*Object)
			buf := new(bytes.Buffer)
			w := tabwriter.NewWriter(buf, 1, 2, 1, ' ', 0)
			fmt.Fprintln(w, "Hash\tSize\tName\t")
			for _, link := range object.Links {
				fmt.Fprintf(w, "%s\t%v\t%s\t\n", link.Hash, link.Size, link.Name)
			}
			w.Flush()
			return buf, nil
		},
	},
	Type: Object{},
}

var ObjectNewCmd = &cmds.Command{
	Helptext: cmds.HelpText{
		Tagline: "Creates a new object from an ipfs template.",
		ShortDescription: `
'ipfs object new' is a plumbing command for creating new DAG nodes.
`,
		LongDescription: `
'ipfs object new' is a plumbing command for creating new DAG nodes.
By default it creates and returns a new empty merkledag node, but
you may pass an optional template argument to create a preformatted
node.

Available templates:
	* unixfs-dir
`,
	},
	Arguments: []cmds.Argument{
		cmds.StringArg("template", false, false, "Template to use. Optional."),
	},
	Run: func(req cmds.Request, res cmds.Response) {
		n, err := req.InvocContext().GetNode()
		if err != nil {
			res.SetError(err, cmds.ErrNormal)
			return
		}

		node := new(dag.Node)
		if len(req.Arguments()) == 1 {
			template := req.Arguments()[0]
			var err error
			node, err = nodeFromTemplate(template)
			if err != nil {
				res.SetError(err, cmds.ErrNormal)
				return
			}
		}

		k, err := n.DAG.Add(node)
		if err != nil {
			res.SetError(err, cmds.ErrNormal)
			return
		}
		res.SetOutput(&Object{Hash: k.B58String()})
	},
	Marshalers: cmds.MarshalerMap{
		cmds.Text: func(res cmds.Response) (io.Reader, error) {
			object := res.Output().(*Object)
			return strings.NewReader(object.Hash + "\n"), nil
		},
	},
	Type: Object{},
}

var ObjectPatchCmd = &cmds.Command{
	Helptext: cmds.HelpText{
		Tagline: "Create a new merkledag object based on an existing one.",
		ShortDescription: `
'ipfs object patch <root> <cmd> <args>' is a plumbing command used to
build custom DAG objects. It mutates objects, creating new objects as a
result. This is the merkle-dag version of modifying an object.
`,
	},
	Arguments: []cmds.Argument{},
	Subcommands: map[string]*cmds.Command{
		"append-data": patchAppendDataCmd,
		"add-link":    patchAddLinkCmd,
		"rm-link":     patchRmLinkCmd,
		"set-data":    patchSetDataCmd,
	},
}

var ObjectPutCmd = &cmds.Command{
	Helptext: cmds.HelpText{
		Tagline: "Stores input as a DAG object, outputs its key.",
		ShortDescription: `
'ipfs object put' is a plumbing command for storing DAG nodes.
It reads from stdin, and the output is a base58 encoded multihash.
`,
		LongDescription: `
'ipfs object put' is a plumbing command for storing DAG nodes.
It reads from stdin, and the output is a base58 encoded multihash.

Data should be in the format specified by the --inputenc flag.
--inputenc may be one of the following:
	* "protobuf"
	* "json" (default)

Examples:

	echo '{ "Data": "abc" }' | ipfs object put

This creates a node with the data "abc" and no links. For an object with links,
create a file named node.json with the contents:

    {
        "Data": "another",
        "Links": [ {
            "Name": "some link",
            "Hash": "QmXg9Pp2ytZ14xgmQjYEiHjVjMFXzCVVEcRTWJBmLgR39V",
            "Size": 8
        } ]
    }

and then run

	ipfs object put node.json
`,
	},

	Arguments: []cmds.Argument{
		cmds.FileArg("data", true, false, "Data to be stored as a DAG object.").EnableStdin(),
	},
	Options: []cmds.Option{
		cmds.StringOption("inputenc", "Encoding type of input data, either \"protobuf\" or \"json\"."),
	},
	Run: func(req cmds.Request, res cmds.Response) {
		n, err := req.InvocContext().GetNode()
		if err != nil {
			res.SetError(err, cmds.ErrNormal)
			return
		}

		input, err := req.Files().NextFile()
		if err != nil && err != io.EOF {
			res.SetError(err, cmds.ErrNormal)
			return
		}

		inputenc, found, err := req.Option("inputenc").String()
		if err != nil {
			res.SetError(err, cmds.ErrNormal)
			return
		}
		if !found {
			inputenc = "json"
		}

		output, err := objectPut(n, input, inputenc)
		if err != nil {
			errType := cmds.ErrNormal
			if err == ErrUnknownObjectEnc {
				errType = cmds.ErrClient
			}
			res.SetError(err, errType)
			return
		}

		res.SetOutput(output)
	},
	Marshalers: cmds.MarshalerMap{
		cmds.Text: func(res cmds.Response) (io.Reader, error) {
			object := res.Output().(*Object)
			return strings.NewReader("added " + object.Hash + "\n"), nil
		},
	},
	Type: Object{},
}

var ObjectStatCmd = &cmds.Command{
	Helptext: cmds.HelpText{
		Tagline: "Get stats for the DAG node named by <key>.",
		ShortDescription: `
'ipfs object stat' is a plumbing command to print DAG node statistics.
<key> is a base58 encoded multihash. It outputs to stdout:

	NumLinks        int number of links in link table
	BlockSize       int size of the raw, encoded data
	LinksSize       int size of the links segment
	DataSize        int size of the data segment
	CumulativeSize  int cumulative size of object and its references
`,
	},

	Arguments: []cmds.Argument{
		cmds.StringArg("key", true, false, "Key of the object to retrieve, in base58-encoded multihash format.").EnableStdin(),
	},
	Run: func(req cmds.Request, res cmds.Response) {
		n, err := req.InvocContext().GetNode()
		if err != nil {
			res.SetError(err, cmds.ErrNormal)
			return
		}

		fpath := path.Path(req.Arguments()[0])

		object, err := core.Resolve(req.Context(), n, fpath)
		if err != nil {
			res.SetError(err, cmds.ErrNormal)
			return
		}

		ns, err := object.Stat()
		if err != nil {
			res.SetError(err, cmds.ErrNormal)
			return
		}

		res.SetOutput(ns)
	},
	Type: dag.NodeStat{},
	Marshalers: cmds.MarshalerMap{
		cmds.Text: func(res cmds.Response) (io.Reader, error) {
			ns := res.Output().(*dag.NodeStat)

			buf := new(bytes.Buffer)
			w := func(s string, n int) {
				fmt.Fprintf(buf, "%s: %d\n", s, n)
			}
			w("NumLinks", ns.NumLinks)
			w("BlockSize", ns.BlockSize)
			w("LinksSize", ns.LinksSize)
			w("DataSize", ns.DataSize)
			w("CumulativeSize", ns.CumulativeSize)

			return buf, nil
		},
	},
}

Functions

func NodeEmpty

func NodeEmpty(node *Node) bool

Types

type Link

type Link struct {
	Name, Hash string
	Size       uint64
}

type Node

type Node struct {
	Links []Link
	Data  string
}

type Object

type Object struct {
	Hash  string
	Links []Link
}